New Aftermarket Fuel Pump Issues |
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New Aftermarket Fuel Pump Issues |
turnaround89 |
Aug 25 2008, 07:19 PM
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#1
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Senior Member Group: Members Posts: 671 Joined: 17-May 08 From: Rockford, Illinois Member No.: 9,067 Region Association: Upper MidWest |
The old fuel pump has three inlets/outlets. I was told i could use a new aftermarket fuel pump, however the new fuel pump has and in and an out, how can i hook up the new fuel pump so that it will work with the fuel system? The engine is a 1.8L carbed. Do i have to hook up the return lines back to the fuel tank? thanks everybody.
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GeorgeRud |
Aug 25 2008, 07:38 PM
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#2
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
You can just run the supply line to the carbs and block off the return line. Others have run a pressure regulator with the excess (greater than 5psi if Webers) going back into the return line.
It always seemed to me to be a good idea to keep the fuel flowing through the pump and back to keep it from heating up too much by sitting, and not having the pump feeling the different fuel loads. Probably not a real concern with these low pressures anyway. You might also consider moving the pump to the location under the tank. Electric fuel pumps like to push fuel much more than try to suck it from far away. What type of fuel pump are you using? |
orange914 |
Aug 25 2008, 07:44 PM
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#3
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
The old fuel pump has three inlets/outlets. I was told i could use a new aftermarket fuel pump, however the new fuel pump has and in and an out, how can i hook up the new fuel pump so that it will work with the fuel system? The engine is a 1.8L carbed. Do i have to hook up the return lines back to the fuel tank? thanks everybody. just a thought: why not use the o.e. fuel pump and open the o.e. fuel regulator to 3 or 4lbs (or whatever you'r running). i've never tried opening adjustment to lower fuel pressure to that point... anyone know if this is possible? the return lines benifit you by circulating the fuel, helping it keep cool. by the way your o.e. pump has 3 fittings 1 inlet from tank 1 outlet to motor 1 outlet (tees into return line to tank) (i believe) 75 up are have only 2 nipples if you use an after market pump just plug the 3rd (from o.e. pump) line that tees into return hose to tank |
SirAndy |
Aug 25 2008, 08:03 PM
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#4
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Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
The old fuel pump has three inlets/outlets. I was told i could use a new aftermarket fuel pump, however the new fuel pump has and in and an out, how can i hook up the new fuel pump so that it will work with the fuel system? The engine is a 1.8L carbed. Do i have to hook up the return lines back to the fuel tank? thanks everybody. For carbs, you can simply plug the return line. Put a cap on it where it exits into the engine comp on the rear firewall. Your new fuel pump is for a carbed engine, correct? If not, do *not* use a high pressure FI pump and regulate it down! That's a engine fire waiting to happen ... When i had my 2056 with dual weber 44 IDFs, i ran a CB rotary fuel pump mounted in the stock location using the stock wiring to power the pump. The rotary pumps are *much* quieter and the CB unit generates the correct amount of pressure, so no regulator is needed. CB rotary Fuel Pump: http://www.cbperformance.com/catalog.asp?ProductID=577 Tech article on how to use the stock wiring (and relay!) to power your carb fuel pump: http://www.914world.com/bbs2/index.php?showtopic=25954 (IMG:style_emoticons/default/bye1.gif) Andy |
bperry |
Aug 27 2008, 01:35 AM
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#5
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Lurker Group: Members Posts: 477 Joined: 16-February 04 From: Dallas, Tx Member No.: 1,661 |
Or see the full Tech Article for a bit more electrical information:
Run the fuel pump for carb conversions - HOW TO --- bill |
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